Sieve shaking machine



Dec. 31, 1935.

Filed Jul 11, 1954 GE. BODIEN ET AL SIEVE SHAKING MACHINE 2 Sheets-Sheet1 Inventors.- G; E, Bodien.

K'ttor-negs.

Dec. 31, 1935. e. E; BODIEN E1- AL SIEVE SHAKING MACHINE 2 Shets-Sheet 2Filed July 11, 1934 Inventor-s: GtE. Boclicn.

I R. Foster.

Patented Dec. 31, 1935 UNITED STATES PATENT OFFICE SIEVE SHAKING MACHINEApplication July 11, 1934, Serial No. 734,600

2 Claims.

Our invention relates to sieve shaking machines. It relates moreparticularly to that class of devices in which a column of sieves ofsuccessively increasing fineness from top to bottom has a shaking motionimparted thereto, whereby the material deposited in the upper sieve isseparated by the successive sieves according to the size of theparticles composing the material. A particular use to which the deviceis adapted is for testing the fineness of sand as determined by theability thereof to pass through the different sieves. An object of theinvention is to provide a machine of this character in which the sievesare subjected to a pendulum-like motion combined with a tapping orjarring action. Another object of the invention is to provide a machineof this character which is of simple and inexpensive construction andyet extremely efficient in operation.

The full objects and advantages of our invention will appear inconnection with the following detailed description and the novelfeatures embodied in our invention will be particularly pointed out inthe claims.

In the accompanying drawings which illustrate a practical embodiment ofour invention, Fig. 1 is a sectional elevational view, the section beingon the line l! of Fig. 5 and on an enlarged scale. Fig. 2 is a detailview showing the operation of a crank pin. Fig. 3 is a similar viewshowing further the operation obtained by the crank pin. Fig. 4 is afront elevational view. Fig. 5 is a View in central vertical section.Fig. 6 is a view taken on the line 6--6 of Fig. 4.

Referring to the particular construction shown in the drawings, it willbe seen that we provide a base member ID containing a slot l2 andprovided with ears M by means of which it may be bolted to any suitablesupport l6 such as a table or bench. Extending up from the base is astandard It having an outturned upper portion 20 which pivotallysupports a pendulum device consisting of two rods 22 which diverge fromthe pivot as shown in Fig. 1 and then extend down parallel to eachother, the divergent portions of the rods being connected by a brace rod24. The rods 22 at their lower ends carry a circular plate 26 having araised periphery within which is adapted to fit a pan 28 having a closedbottom. Superimposed upon the pan 28 when the device is in use is aseries of sieves 30 having screens 32 for their bottom members, thescreens increasing in fineness from the upper one to the lower one. Across bar 34 is slidably mounted on the rods 22 and at its ends isprovided with clamps 36 by means of which the cross bar may be clampedupon the uppermost one of the sieves 3e. Extending down from thecircular plate 26 are two spaced fingers 38 adapted to swing in the slotI2 and between which is a crank pin 40 whose diameter is somewhat lessthan the distance between the fingers. The crank pin 40 is carried by adisk 42 secured to the inner end of a shaft 46 mounted in a bearing tocarried by the base It. The outer portion of the shaft 54 carries abalance wheel 41 and a pinion 48. This pinion meshes with a gear 50secured to a stub shaft 52 adapted to be rotated by a hand crank 54 orin any other suitable manner.

The operation and advantages of our invention will be readily understoodin connection with the foregoing description and the accompanyingdrawings. When the shaft 44 is rotated in the manner previouslydescribed, the crank pin 40 will impinge alternately upon the twofingers 38 and cause the rods 22 carrying the sieves 30 to swing like apendulum, it being obvious that the lowermost sieve has the longest arcof oscillation. Due to the fact that the diameter of the crank pin 40 isless than the distance between the fingers 38, a tapping action will beimparted to the sieves at each oscillation. This action will beunderstood by referring to Figs. 2 and 3. Fig. 2 represents the extentof movement toward the left caused directly by the crank pin impingingon the left hand finger. However, the momentum of the pendulum carriesit further so that the right hand finger strikes against the crank pinthereby imparting a knock to the sieves which action is duplicated whenthe pendulum is swung towards the right. This tapping or jarring actionwill be repeated as long as the device is continued in operation.

We claim:

1. A sieve shaking machine comprising a sieve column consisting of aseries of screens increasing in fineness from the upper to the lowerone, a fixed horizontal pivot upon which said column is suspended forpendulum-like movement thereof to and fro in a vertical plane only, twospaced fingers associated with the lower end of said column, a crank pinbetween said fingers for imparting said movement to said column andarranged to also give a jarring action to said column, and means foroperating said crank pin.

2. A sieve shaking machine comprising a sieve column consisting of aseries of screens increasing in fineness from the upper to the lowerone, a fixed horizontal pivot upon which said column is suspended forpendulum-like movement thereof to and fro in .a vertical plane only, twospaced fingers associated with the lower end of said column, a crank pinbetween said fingers having a diameter less than the distance betweensaid fingers, a disk to which said crank pin is secured, a shaft towhich said disk is secured, and means for rotating said shaft.

GORDON E. BODIEN. JOSEPH R. FOSTER.

